英文關鍵字
backhoe
construction
development
dig
digger
dirt
dump
earthmover
engineering
equipment
excavation
excavator
granite
ground
haul
heavy
industrial
industry
limestone
loader
lorry
machine
machinery
mine
mining
mover
open
ore
pit
quarry
road
sand
sandpit
scoop
shovel
site
soil
transportation
truck
unloading
vehicle
work